Improvement in grindstone-frames



ITFID STATE S, .PATENT Enron.

JOSEPH W. DOUGLAS, OF MIDDLETOWN,CONNECTIOUT, ASSIGNOB TO W.

DOUGLAS ANDBLDOUGLAS, OF SAMEPLACE.

IMPROVEM ENT IN GRlNDSTONE-FRAMES.

Specification forming part of Letters Patent No. 81,61 1, datedSeptember 1, 1868.

To all whom it may concern Be it known that I, JosnPH W. DOUGLAs, ofMiddletown, in the county of Middlesex and State of Connecticut, haveinvented a new and Improved Grindstone-Frame; and I do hereby declarethat the following is a full and exact description thereof, which willenable those skilled in the art to make and use the same, referencebeing had to the accompanying drawings, and tb the letters of referencemarked thereon.

This invention relates to a new and improved cast-iron frame forgrindstones; and it consists in a novel manner 0f constructing the same,as hereinafter fully shown and described, whereby several advantages areobtained over the frames hitherto constructed for such purpose.

In the accompanying sheet of drawings, Figure l is a side view of myinvention; Fig. 2, an end view ofthe same; Fig. 3, a plan or top view ofthe same 5 Fig. 4, a detached side view of the grindstone; Fig. 5, avertical section of the same, taken in the line x m, Fig. 4.

Similar letters of reference indicate like parts.

Arepresents the water-chamber ofthe frame, which has a curved bottom,forming a portion of a circle concentric with the grindstone B. Thiswater-chamber has a longitudinal iiange, C, extending all aroundit. Thewatenchamber, at each side, has dovetail anges a a, two near each end,to receive the upper ends of the legs D, the latter being provided, attheir upper ends, with taper lips b, to t between the iianges. (See Fig.l.)

By this means the legs may be readily attached to and detached from thewater-chamber, and the detachment of the legs admits of the .devicebeing compactly boxed for shipment.

The shaft E of the grindstone rests upon friction-rollers c, arranged inthe usual way, the boxes or frames F, in which said friction rollers aretted, being secured to the ange C, which is supported or sustained atthese points by brackets Gr Gr, -shown in Figs. l and 2.

The water-chamber, flange, and brackets are all cast in ,one piece.

0n the upper surface of the flange C, at each end of the water-chamberA, there are cast parallel ways or guides d, on two of which, at one endof the frame, there is iitted a support or standard, H, slightlyinclined from a vertical position toward the grindstone, as shown inFig. l. This support or standard may be adjusted nearer to or fartherfrom the grindstone, 011 its ways or guides d d, and secured at anydesired ypoint by a set-screw, I. To this support or standard H there isattached a tool-rest, J, which is capable of being adj usted higher orlower, and may be secured at any desired point by a set-screw, K. Bythis simple arrangement, it will be seen that the tool-rest may be adjusted nearer or farther from the stone, and secured higher up or lowerdown, above 0r below the center of the same, as circumstances mayrequire.

On the other ways or guides d d, at the opposite end of thewater-chamber, there is tted an adjustable iiange or guard, L, securedin position by a set-screw, M. This flange or guard simply covers theedge of the stone 0pposite to the part where the tool is applied on restJ.

One of the legs D is cast with an eye, e, in Y which a treadle' orfoot-lever, N, is secured by a fulcrum-pin, j', said treadle orfoot-lever being connected, by a pitman, O, with a crank, P, on theshaft E of the grindstone. The shaft E has a screw-thread, g, cut onlitwhere it passes through the eye of the stone B,.and this screw has aslot or groove, h, made longitudinally in it, extending its wholelength, to receive lips or projections t' of washers Q Q, which are ttedloosely on the screw, and are pressed against the sides of the stone bynuts B B. (See Fig. 5.)

The stone B b, it will be seen, is clamped iirmly on its shaft E byscrewing yup the nuts B B. By this means the stone is prevented fromslipping on its shaft E, as the washers Q Q, in consequence of theirlips or projections i fitting in the groove h, are prevented fromturning on vthe shaft, and the washers are clamped rmly against the sideof the stone, which, on account of its peculiarv granular structure,will not slip between the washers.

Having thus described my invention, I claim .as new and desire to secureby Letters Patent- l. The adjustable support or st rdard H, withtool-rest J applied to it, subsil .r tially as and for the purposespecified.

2. The providing the shaft; E with a. screwthread, g, having a slot orgroove, h, made longitudinally in it, in connection with the 'washers oQ, furnished with nps or projections i, to t in the slot or groove I1.,and the nuts R R on Jche screw-thread g, :1.11 arranged substantially asand for the purpose set forth.

JOS. W. DOUGLAS.

Witnesses:

JNO. M. DOUGLAS, GEO. M. SMITH.

